Stocks and portfolio investment failures have caused many concerned investors to move major accounts, such as 401-K and other retirement accounts.
(A) Stocks and portfolio investment failures
(B) Failures of stocks investments and portfolio investments
(C) Failures in the investment of stocks and other portfolios
(D) Failures of stock and other portfolio investments
(E) Portfolio investment failures, including stocks
OA is c

Please i need someone to help me tackle this question. It's quite confusing to me <i class="em em-pensive"></i><i class="em em-worried"></i>
Thank you so much<i class="em em-v"></i>