You are considering a 5-year project and wish to find all its positive real IRRs. You have already found two complex IRRs (aka imaginary, complex, or "weird" IRRs), which are 0.2 + 0.3i and 0.9 0.8i, where i is the unit of the imaginary numbers. Of all the remaining IRRs, how many are real?

a) 0

b) 1

c) 2

d) 3

e) 4

f) 5

g) Cannot be determined from the information given in the problem.