Problem: How does the sentence end?

Katrina was bit by an insect a few days ago and Samantha thought the bite looked infected. 
OPTIONS:
- Katrina  suggest they see a Doctor.
- Samantha  suggest they see a Doctor.
Answer: Samantha  suggest they see a Doctor.

Problem: How does the sentence end?

Cases of infidelity make it almost impossible to save a breaking marriage. The 
OPTIONS:
- Marriage is serious.
- Infidelity is serious.
Answer: Infidelity is serious.

Problem: How does the sentence end?

The quiche was taken out of the fridge and put into the oven because the 
OPTIONS:
- fridge was building it.
- oven was building it.
Answer: oven was building it.

Problem: How does the sentence end?

they were required to cook a lot of food at a limited time for the guests, the 
OPTIONS:
- food given was too little.
- time given was too little.
Answer:
time given was too little.