Working with Cypher Data

I am new to Cypher, and going through the Graph Academy Training. There appears to be a problem with this question in Working With Cypher Data. I thought I new the answer. I got it wrong. I then tried every single combination and they were ALL wrong, which is not possible. Does the training just randomly mark you wrong after a certain number of tries or something? Because I literally spent an hour going through each combination of answers and none of them worked.

Question 1
What functions below aggregate results:

Select the correct answers.

count()

size()

map()

collect()

Hello @mcdnjmcd,

Welcome to the Community!

I see in our system that you were able to successfully answer that question and successfully completed this course with your certificate of completion.

Congratulations!

Elaine