Question

Select the correct answer.

Which of the following is a sentence fragment?
A.
Dolphins have a higher level of intelligence than once supposed.
B.
Dolphins communicate with each other.
C.
After dolphins have been underwater for a long period.
D. Dolphins have a sound-sensing system.
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Answer 1

C. After dolphins have been underwater for a long period.

Step-by-step explanation:

A sentence fragement is an incomplete sentence/thought. In all the rest of the answers, there is a concrete meaning behind what is being saif. However, in C, the write doesn't tell you what happens after a dolphin has been underwater for a long period. Thus, it's an incomplete thought and a sentence fragment.