-Which one of the following would have the greatest present value, assuming a positive discount rate?

Select one:

a.$1,000 today plus $400 a month for six months.

b.$1,000 today plus $200 a month for a year.

c.$1,000 today plus $100 a month for 2 years.

d.$2,200 today plus $200 a month for six months.

e.$2,200 today plus $100 a month for a year.

Just the correct Answer (LETTER) without any explain at all at all PLEASE. I need the answer very fast Please