Wich type of sentence contains two or more independent clauses?

The correct answer is a compound sentence.

In this case, a compound sentence is a type of sentence which contains at least two independent clauses but it can contain more.These two clauses are related in some way and may be linked by a coordinating conjunction,for instance, and,but,for,among others.

An independent clause is a clause that can stand on its own it does not need another clause to understand its meaning.

An example of a compound sentence which contains two independent clauses may be: I want to do exercise but my leg hurts. In this case, the two clauses can stand on its own, their meanings are related and they are connected by the conjunction but.

the answer is a)   a sentence of death costs the state "almost three times as much as a sentence of life in prison" (delon 147)