This practice is entirely unnecessary; but, it makes the ...

[amal]

This practice is entirely unnecessary; but, it makes the manufacturers very happy.
 
  A) unnecessary but it B) unnecessary but, it C) unnecessary, but it

Question 2

Which sentence is correct, clear, and concise?
 
  A) In one study of primate social interaction, it was reported that they engage in
  apparent deceptions.
  B) One study of primate social interaction reported that chimpanzees engage in
  apparent deceptions.
  C) In one study of primate social interaction, researchers reported that they
  engage in apparent deceptions.

[chjcharjto14]

Answer to Question 1

C

Answer to Question 2

B

[amal]

Excellent

[covalentbond]

Gracias!