One of the underlined words or phrases is incorrect; identify wich is wrong:

One of the underlined words or phrases is incorrect; identify wich is wrong:

The half of all the astronauts on space flights are afflicted with debilitating space sickness, an ailment akin to car sickness and marked by nausea and vomiting.

A)are afflicted with

B)The half of all the

C)marked by

D)on space