2 goes with the second one (control rods).
3 goes with forth one (mass of unstable fuel)
4 goes with one (shield)
1 goes with third one (moderator)
5 goes with coolant
4. Diseases caused by manufacturing materials
I think your missing a Statement..
Answer:
D. statement 2 is an objective summary because it introduces the main character and his problem in a thoughtful tone.
Whattt? No details please provide
I don't know what the other 2 are but the last Question is Hair.