Brought on by weightlessness

[sanjaylakhani]

Brought on by weightlessness in protracted space flight, besides the obvious hazards of meteors, rocky debris, and radiation, astronauts also have to deal with muscle atrophy.
a. Brought on by weightlessness in protracted space flight,besides the obvious hazards of meteors, rocky debris,and radiation,astronauts also have to deal with muscle atrophy.

b. Besides the obvious hazards of meteors,rocky debris,and radiation in protracted space flight, astronauts also have to deal with muscle atrophy,which is brought on by weightlessness.

c. In protracted space flight,besides the obvious hazards of meteors,rocky debris,and radiation, astronauts also have to deal with muscle atrophy brought about through weightlessness.

d. Besides the obvious hazards of protracted space flight,which include meteors,rocky debris,and radiation,astronauts also have to deal with another problem,which is the muscle atrophy that occurs after an extended period of weightlessness.

e. Besides the obvious hazards of meteors,rocky debris,and radiation,astronauts in protracted space flight also have to deal with muscle atrophy brought on by weightlessness.

SOURCE: LEARNING EXPRESS

Confused between choice B & E

How is E superior?

Can anybody help

[kylo]

i think B is better.


Thanks!

[JonathanSchneider]

E offers two improvements. First, the modifier "in protracted space flights" described the astronauts, rather than the radiation. (While it could be said that "in protracted space flights" modifies the entire list of dangers previously stated, this is not clear.) Second, the ", which is...." is not needed, as we can simply use an adjective. (This is because the verb following the word "which" is just "is.")