Answer:
B.) A monthly budget worksheet
Explanation:
We are required,
To find the type of worksheet which can help us to figure out how much to spend and invest.
As we know,
Planning monthly budget gives us an insight on the amount of money we have and how much can be spent after investing some part of it.
So, constructing a monthly budget worksheet controls the amount to be spent and invest within a month.
Hence, a 'monthly budget worksheet' would be the best required option.