United Independent Workers of America declare its workers are going on strike against Sinclair Manufacturing. Sinclair states the collective bargaining agreement is still in force for another eight months and that it contains a no-strike clause. UIWA claims the CBA's no-strike provision is not binding since new union leadership is in place. Which of the following statements is correct?

a. UIWA cannot strike, as strikes to exert economic pressure on management are prohibited by the NLRA.

b. UIWA can strike since new leadership is now in control.

c. UIWA can strike since no-strike provisions have been ruled by the courts to be unenforceable.

d. UIWA cannot strike unless it gives 60 days notice.