Assume the Following Information for Pexi Co

Assume the following information for Pexi Co.,a U.S.-based MNC that is considering obtaining funding for a project in Germany:
U.S.risk-free rate = 4%
German risk-free rate = 5%
Risk premium on dollar-denominated debt provided by U.S.creditors = 3%
Risk premium on euro-denominated debt provided by German creditors = 4%
Beta of project = 1.2
Expected U.S.market return = 10%
U.S.corporate tax rate = 30%
German corporate tax rate = 40%
What is Pexi's cost of dollar-denominated debt

A) 7.0%.
B) 8.0%.
C) 6.3%.
D) 4.9%.