input: OPTIONS:
- microorganisms
- mechanical waves
- that material's properties
- the looseness of soil
- Muscles around the urethra
- Bones around the urethra
- The brain
- Muscles around the anus Now, answer this question: You are presented with the quiz "What controls the urination process?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "urine leaves the body through a sphincter in the process of urination" and "muscles around the urethra, called sphincter muscles, control the flow of urine out of the body". So, what's the best answer to the question?
A:
output: Muscles around the urethra

input: OPTIONS:
- DNA
- eardrum
- critical organs
- permineralization
- A ruler
- nervous system
- communication center
- respiratory system Now, answer this question: You are presented with the quiz "Some deuterostomes lack a centralized what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "echinoderms lack a centralized nervous system" and "all echinoderms are deuterostomes ". So, what's the best answer to the question?
A:
output: nervous system

input: OPTIONS:
- sex
- spring
- bird
- DNA
- ova
- production
- factories
- ovum Now, answer this question: You are presented with the quiz "What gives rise to offspring?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "reproduction is the process by which living things give rise to offspring" and "physiologically, sex is for the purpose of reproduction". So, what's the best answer to the question?
A:
output:
sex