Read this sentence. There are more and more women in the world entering the field of science than women who entered the field many years ago.

Which of the following is the most concise way to write this sentence without losing important information?

Select one:

a.
There are more women entering the field of science than who entered the field many years ago.

b.
More and more women in the world enter the field of science as the years go by.

c.
Over the years, more and more women have become scientists.

d.
Many women are scientists.