What is a scientific theory? (2 points) a
A law that is always true
A hypothesis about nature
C с
An educated guelmes based on observations
d
An explanation of how the natural world works

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.

Should be right

your  whole body is with a higher temperature than normal.  The reason  you can't take your own temperature with your hand is because the hand is the same temperature as your head.You won't be able to detect a difference in temperature between them.