Which sentence uses INFORMAL language?

Responses

A About half of fraternal twins’ genetic information is the same, and the other half is different. About half of fraternal twins’ genetic information is the same, and the other half is different.

B It is usually easy to tell when twins are identical.It is usually easy to tell when twins are identical.

C You might think that all sets of twins should look alike, but you'd be wrong.You might think that all sets of twins should look alike, but you'd be wrong.

D Often, they look just alike and people have a hard time telling them apart. Often, they look just alike and people have a hard time telling them apart.

D Often, they look just alike and people have a hard time telling them apart.

why'

The use of informal language can be seen in the phrase "people have a hard time telling them apart." This phrasing is more conversational and casual than the more formal alternatives.

D Often, they look just alike and people have a hard time telling them apart.