the depth of the soil the temperature of the water the number of days until the seeds sprout the size of pot used for growing the seeds
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Marta and Roger are comparing how long it takes two different types of seeds to sprout. They plant both types of seeds in similar pots, place them in a sunny window, and water them daily. If they want to conduct their investigation correctly, which information is most important to record?
Possibilities:
- the depth of the soil
- the temperature of the water
- the number of days until the seeds sprout
- the size of pot used for growing the seeds

the number of days until the seeds sprout