How/What did you get to school?

Solution:

The question "How/What did you get to school?" asks about the method or means of traveling to school. Let's analyze the options:

1. Option 'a' "Valentine's Day!" is a holiday.
2. Option 'b' "It's on 16th June." is a date.
3. Option 'c' "By bus." describes a method of transportation, which answers "How did you get to school?".
4. Option 'd' "Because I lost my new watch." is a reason for sadness.
5. Option 'e' "They're fairy penguins." describes beings.
6. Option 'f' "We can!" is a statement of ability.
7. Option 'g' "It's in the cupboard." is a location.

Thus, the most appropriate answer to "How did you get to school?" is "By bus." This corresponds to option 'c'.

Answer: c By bus.