Question

。

「The meeting that was to be held」の部分の文法がよくわかりません。教えてください

空欄に入る最も適切なものを選びなさい。
The meeting ( ) put off until next week due
to rain.
1.that was held on Friday has
2. that was held on Friday has been
3. that was to be held on Friday has
4.that was to be held on Friday has been