What is the structure of this sentence?

After the Santa Maria grounded on a reef and sank, Christopher Columbus used the remains of the ship to build a fort on shore.

A.
compound

B.
simple

C.
complex

D.
compound-complex

Question

What is the structure of this sentence? 
 
After the Santa Maria grounded on a reef and sank, Christopher Columbus used the remains of the ship to build a fort on shore.
 
 A.
compound
 
 B.
simple
 
 C.
complex
 
 D.
compound-complex

angel.candy · Answer

D. Compound-complex. A compound-complex sentence is made from two independent clauses and one or more dependent clauses. There are two independent clauses and several dependent clauses in the sentence.