Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select No substitution required.

A third of us are feeling compelled to check our phones in the middle of the night.

A

A third among us feeling compelled to check our phones

B

A third of us feel compelled to check our phones

C

No substitution required

D

A third of us feel compelled checking our phones