Question

These writings have been determined to be as old as 2,600 years; because they are so old, they must be carefully protected behind glass.

a. Simple
b. Compound
c. Compound-Complex
d. Complex

Answer 1

C is the correct answer

Step-by-step explanation:

Answer 2

The answer is:

c. Compound-Complex

The given sentence is an example of a compound-complex sentence because it consists of two independent clauses which are “These writings have been determined to be as old as 2,600 years” and “they must be carefully protected behind glass” and one dependent clause which is “because they are so old”.