If you are making a formal observation, you should: Engage with the children
O Join in teaching and play activities
O Talk to the teachers about the children
O Sit quietly in a low, out of the way chair
O Record the children

C

Explanation:

Since it says Formal observation,  not just observation, C would be the best choice. Why? Well during an observation  you usually don’t talk and you watch how the teacher ans students interact. So that crosses out A and B. Lastly, D doesn’t really make sense because first off, you can’t record students without their or their parents permission. Secondly, recording students it’s really observing them since a recording could just be an audio recording.

this is all why C is the best answer, also whenever administrators came to my past classes they basically just sat in a seat, didn’t talk, and observed the class^^

have a lovely day!