If Every Time Disposable Income Increases by $5 Billion,consumption Increases

Multiple Choice

If every time disposable income increases by $5 billion,consumption increases by $4 billion and saving increases by $1 billion,the MPC and MPS are,respectively,

A) 1/4,1/2
B) 1/2,1/2
C) 1,0
D) 4/5,1/5
E) the answer is indeterminate from the information given