Answer: A. i and ii only
Explanation:
Weight and mass are often used interchangeably but this is not accurate for they measure different things. Weight for instance, is the force of gravity that is acting on a body. A person's weight will therefore be different on the moon than it is on earth due to the difference in gravity.
Mass on the other hand is the amount of matter in a body. Mass does not change depending on the gravity acting on the body but only changes if there is a change in the amount of matter in the said body.
