Consider the risk$-$return relationship in T$-$bills during each decade since $1950.$ Given this data, which of the following statements is correct?DecadeCoV$1950$s$0\mathrm{.}401960$s$0\mathrm{.}331970$s$0\mathrm{.}291980$s$0\mathrm{.}291990$s$0\mathrm{.}242000$s$0\mathrm{.}55$Consider the risk$-$return relationship in T$-$bills during each decade since $1950.$ Given this data, which of the following statements is correct?DecadeCoV$1950$s$0\mathrm{.}401960$s$0\mathrm{.}331970$s$0\mathrm{.}291980$s$0\mathrm{.}291990$s$0\mathrm{.}242000$s$0\mathrm{.}55$The best risk$-$return relationship was during the $1950$s$.$The best risk$-$return relationship was during the $1990$s$.$None of these choices are correct.Since T$-$bills are backed by the full faith of the U$.$S$.$ government, computing the risk$-$return relationship for them is invalid.Question at position $99$