When a $$2,000$ increase in income causes a $$1,750$ increase in consumption spending:

Question $1$ options:

a$)$

the marginal propensity to save $($MPS$)$ is $0\mathrm{.}20.$

b$)$

the marginal propensity to consume $($MPC$)$ is $0\mathrm{.}80.$

c$)$

the marginal propensity to consume $($MPC$)$ is $0\mathrm{.}875$

d$)$

then MPC $-$ MPS $=1.$