The most suitable material for making the core of an electromagnet is a
Steel
b
Aluminum
С
Soft iron
d
Brass

Work is reduced while time is decreased

Idon't know the answer to this question

The scientist was trying to demonstrate that humans can introduce their own biases into an experiment. bias is a prejudice in favor of one thing compared with the another.in this case, the bias is believing that mice with higher intelligence would solve the maze better.  bias in science should be avoided as it is not desirable that research becomes influenced by scientists personal beliefs.