The given diagram shows a mattress that has springs inside it.
Which of the following statements are correct when the boys lie on the mattress?
(a) The more mass the boys have, the greater will be the force that acts on the springs.
(b) The springs will have a change in their masses.
(c) The springs will be compressed.
(d) The springs will be stretched.
A(a) and (b) only
B(a) and (c) only
C(a) and (d) only
D(b) and (d) only
b