Of the following, which are valid Monetary Policy tools to stimulate the economy during a recession?

Of the following, which are valid Monetary Policy tools to stimulate the economy during a recession?

                                              i.    Lower the federal funds rate

                                             ii.    Increase federal spending on infrastructure

                                            iii.    Cut federal income tax rates

a.    (i) and (ii) but not (iii)

b.    (ii) and (iii) but not (i)

c.    (i) and (iii) but not (ii)

d.    All three: (i),(ii) and (iii)

e.    (i) only

f.     (ii) only

g.    (iii) only

h.    None of these are appropriate fiscal policy tools