Вопрос по английскому языку:

Choose the cerect word to complete each sentence.
Apply, applying, applicant, application, applicable
a) We have interviewed five _____ for the new position
b) The last part of the form is not ______ to foreign stidents.
c) My student is thinking of _____ for a government grant to continue his reseasrch.
d) The new book uses business _____ to teach computer studies.