The boy with the biggest head in school was adjudged the winner of the internationally organized competition. Select one:
a. Simple
b. Complex
c. Compound

Complex

Explanation:

This sentence has a independent clause and a dependent clause. This is why this is a complex sentence.

Simple sentences only have one verb and one subject, so this is not simple, and compound sentences are combined with "because", "and", etc.

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B

Explanation:

(The boy was adjudged the winner of the internationally organized competition.) - independent clause

(with the biggest head in school ) - dependant clause

Simple sentence = one independent clause (can exist on it's own) (has subject [who] and verb [what])

compound sentence = 2 or more independent clause

complex = 1 or more independent + 1 or more dependent (need to have independent clause, cannot exist on it's own)