Find all statement$($s$)$ that is$($are$)$ correct:

a$.$ Under the Expectations Hypothesis, if you buy a $10-$year risk$-$free zero$-$coupon bond, and hold it

for $4$ years, you can expect to earn today's $4-$year zero rate, $z_{04},$ per annum over the four years.

b$.$ In reality, if you buy a $10-$year risk$-$free zero$-$coupon bond, and hold it for $4$ years, your return per

annum over the four years is uncertain and risky.

c$.$ If you buy a $10-$year risk$-$free zero$-$coupon bond, and hold it for $10$ years until maturity, your

return per annum is guaranteed to be today's $10-$year zero rate, $z_{0,10}.$

A$.a,b,c$

B$.$ b

C$.a,b$

D$.$ b$,$ c

E$.$ c