Which is considered a scientific observation?

Observations are receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments.

Any data recorded during an experiment can be called an observation.

C 10% Condition.

Step-by-step explanation:

Let's Look at them one by one.

A: Large Enough sample condition.

this is met because 600 students is a good number to carry out a surwey.

B: Randomization,  600 incoming freshman are definitely random.

C: we are left with C so the answer is C.