4) On Monday, I bought some stocks that lost $10 \%$ of their value on Tuesday and gained $10 \%$ on Wednesday compared to Tuesday. I immediately sold my stocks. Compared to the initial price, the final price is
(A) the same
(B) decreased by $1 \%$
(C) increased by $1 \%$

(D) decreased by $10 \%$

(E) increased by $10 \%$
4) The answer is $\mathbf{( B )}$.

If on Monday each share was worth 100, on Tuesday it was worth 90, and on Wednesday I sold it for 99, thus losing 1\%.