5 Part A
What is the author's primary purpose
(a)
in writing "Mapping the Invisible"?
А
to explain the success some scientists are having in their work on dark
matter
B
to explain why scientists believe that it is becoming easy to understand
dark matter
ht
to explain that scientists have been researching what they think dark
matter is
10
D
to explain which scientists are most responsible for new discoveries about
dark matter
.ch
to
the
(6)