Answer:
D) Muscle strength and size training
Since he's upping the weight then we can assume he's trying to build more muscle
I think its b. im not rlly sure
It is a collective pound, describing a GROUP of people.
For example, a music student might compare herself to the star student of the class. If she finds that her abilities do not measure up to her peer's talents, she might be driven to achieve more and improve her abilities.
Source: verywellmind.com