Which point from the speech most validly supports Warren's
argument that wage discrimination against women currently
exists?
"Women are ready to fight back against pay
discrimination, but it's not easy."
"We are not going to give up on passing the
O Paycheck Fairness Act to level the playing field for
hardworking women in the workplace."
O
"Even while women still earn less than men in 99.6
percent of occupations, Senate Republicans won't
even let the Senate vote on a bill to help make the
workplace a little fairer for women."
"I honestly can't believe that we're still arguing over
equal pay in 2014."

Alberta teachers (Canada) fought this battle (and won) in the 1920s. I'm surprised to read that the battle still rages almost 100 years later in the United States.

There is no other answer but this one (and it is really shameful):

Even while women still earn less than men in 99.6 percent of occupations, Senate Republicans won't even let the Senate vote on a bill to help make the workplace a little fairer for women.
"I honestly can't believe that we're still arguing over equal pay in 2014."