(1) space: the final frontier! (2) many people see space as a true frontier. (3) they are excited by both the exploration of space and the potential of space. (4) not everyone agrees with this. (5) some people think that the money would be better spent solving earth’s problems. (6) however, the truth is that the money spent on space exploration is critical to solving our problems on earth.

which of the following is the thesis statement?
a) sentence 2
b) sentence 3
c) sentence 5
d) sentence 6