input: OPTIONS:
- electromagnetic energy
- viruses
- the immune system
- bacteria
- Allergies
- Microscope
- the colon
- turn to a doctor Now, answer this question: You are presented with the quiz "What can recognize cancer cells as foreign to the body?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "antigens are molecules that the immune system recognizes as foreign to the body" and "antigens are expressed by cancer cells". So, what's the best answer to the question?
A:
output: the immune system

input: OPTIONS:
- heat
- dry air
- blue skies
- rain
- storms
- drought
- Injury
- force Now, answer this question: You are presented with the quiz "What is a result when warm air advances on cold air?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "awarm front causes cloudy and rainy weather" and "if warm air is advancing on cold air, the front is designated a warm front". So, what's the best answer to the question?
A:
output: rain

input: OPTIONS:
- organs
- critical organs
- eye sight
- mammals
- humans
- gravity
- lymphocytes
- AIDS Now, answer this question: You are presented with the quiz "what does HIV infect and destroy?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "hIV infects and destroys helper T cells" and "t-helper cells are lymphocytes". So, what's the best answer to the question?
A:
output:
lymphocytes