fix the mistake:

Artifacts from Costa Rica, *though* (A) less familiar to the public *than* (B) many other archaeological discoveries,* is* (C) sophisticated in both design and materials.

A.
Is (C)

B.
Though (A)

C.
Than (B)

D.
No error.

Question

fix the mistake:

Artifacts from Costa Rica, *though* (A) less familiar to the public *than* (B) many other archaeological discoveries,* is* (C) sophisticated in both design and materials.
 

  
 
 
 A.   
    Is (C)
   
  
 
 
 B.   
    Though (A)
   
  
 
 
 C.   
    Than (B)
   
  
 
 
 D.   
    No error.

anonymous · Answer

instead of "is", use "are" because the subject is plural