Final answer:
The sinking of the RMS Lusitania resulted in the loss of many lives, including first class women passengers.
Step-by-step explanation:
The sinking of the RMS Lusitania resulted in the loss of many lives, including first class women passengers. While the exact number is not specified in the provided information, it is mentioned that over 1,200 passengers lost their lives in the sinking, and 128 of them were American citizens. Therefore, it can be inferred that a significant number of first class women may have died in the sinking.