Which is a compound-complex sentence? a) the dog began to bark at the visitor, and the cat ran under the chair. b) the teacher had just started the math lesson when the fire alarm bell began to ring. c) after they cleaned their rooms, the boys planned to go swimming, but it started to rain. d) both the boys and the girls were excited about going to the mountains and spending the night.

C). After they cleaned their rooms, the boys planned to go swimming, but it started to rain.

Explanation:

A compound-complex sentence as the name suggests brings the compound and complex sentences together that contains at least three minimum clauses which make it a complicated sentence that is used to convey longer thoughts. It carries at least two coordinate independent clauses with one dependent clause at least, joined with a coordinate and subordinate conjunction or a relative pronoun. According to the questions, option C seems to perfectly justify the above claim as it contains two independent clauses, 'the boys planned to go swimming' and 'it started to rain' and one dependent clause 'After they cleaned their rooms' joined with coordinating conjunction 'but'.

the correct order is:

you're your own worst enemy:

they're going to say what they say, but

their opinions aren't holding you

back. it's your self-defeatist

attitude that's keeping your work

from getting its due.

sentences vary by structure as well as by function. there are compound, complex, and compound-complex sentences.

simple sentence

i like to read.

a simple sentence has one independent clause.

compound sentence

i like to read, and i also like to write.

a compound sentence includes more than one independent clause, connected by a coordinating conjunction (and, but, for, nor, or, so, or yet).

complex sentence

i prefer to read books that are bestsellers.

a complex sentence includes one independent clause and one or more dependent clauses. (a dependent clause is one that cannot stand alone.) types of dependent clauses include relative clauses (i kicked the boy who pinched me), adverb clauses (i am going home now because i have a curfew), and noun clauses (i don't know what to do next).

compound-complex sentence

although i prefer to read current bestsellers, i do like to read old agatha christie mysteries, and i also like some 20th-century science fiction.

compound-complex sentences take a bunch of clauses (multiple independent clauses, and one or more dependent clauses) and toss them together like a salad. although these sentences take practice to write in a grammatically correct fashion, they can hold a tremendous amount of meaning, and are common in academic writing.