Which of the following sentences is grammatically correct?

a.Only Bill wanted to go to the lake. [Intended meaning: Bill wanted to go to the lake, but no one else did.]

b.Bill only hinted that he would help us move. [Intended meaning: Bill hinted but did not, for example, promise that he would help us move.]

c.Bill wanted only Mary to win. [Intended meaning; Bill wanted Mary to win, but did not want anyone else to win.

d.all of these