33. Let $S 1 , S 2 \ldots$ be squares such that for each $n ^ { 3 } 1$, the length of a side of Snequals the length of a diagonal of $\mathrm { Sn } + 1$. If the length of a side of S 1 is 10 cm , then for which of the following values of $n$ is the area of $S n$ less than $1 \mathrm { sq } . \mathrm { cm }$ ?\\
(A) 7\\
(B) 8\\
(C) 9\\
(D) 10\\