Riddle

I remain unseen but hold many things, and when you are making a decision you consult me. What am I?

Choose an answer

A.A journal
B.A calculator
C.A compass
D.Mind
Hint: It's a word with 4 letters, starting with "M".

Answer

Mind

Why this is the answer

Your own mind holds countless unseen thoughts and memories, and you naturally consult it before making any decision.

This riddle is filed under "What Am I?" Riddles and rated Medium.