Final answer:
The suffragettes did not use a national strike by all female workers as a strategy to win the right to vote; their strategies included campaigning for a constitutional amendment, legal challenges, and state-level advocacy.
Step-by-step explanation:
The strategy that was NOT used by suffragettes to win the right to vote for women was b. call all female workers to go on a national strike. Suffragettes utilized various methods such as campaigning for a national constitutional amendment, testing the 14th Amendment in court, and trying to convince state legislatures to grant them the vote. These efforts ranged from meticulous legal challenges to more demonstrative actions such as picketing the White House. However, calling all female workers to go on a national strike was not a recorded strategy of the women's suffrage movement in the United States.