Question

In the passage, select the word group that is NOT a complete sentence. If all word groups in the passage are complete sentences,

select "All word groups in the passage are complete sentences."

The trainee for the teller's position was worried about his speed. He was also unsure of his computer skills. Until he learned
the new system.

A
B
C
D

Answer 1

The answer above is correct

Step-by-step explanation:

Answer 2

C (the third one) is not a complete sentence.

Step-by-step explanation:

The first two options are independent clauses. The third one is a dependent clause. You can't say the third sentence alone, but you need to connect it with another independent clause for it to work.