I'm so confused about this question.
Jesse Jackson's Rainbow PUSH _______ to encourage diverse populations to become socially and politically active, was created in 1996 by the merging of 2 groups Jackson had previously founded
We're offered 5 options to fill in the blank:
- coalition was established
- coalition is established
- coalition, establishing
- coalition, which being established
- coalition, established
The official, correct answer is 5, but I just cannot understand why 1 is wrong?