gwd-23-q20

Both the Federal Reserve’s decision that borrowing rates be raised, along with investor’s speculation that another increase might be on the way, helped bolster the dollar in recent weeks by making deposits more attractive.

1. that borrowing rates be raised, along with investor’s speculation that another increase might be on the way, helped bolster the dollar in recent weeks by making

2. that borrowing rates be raised and investors’ speculation of possibly another increase on the way helped to bolster the dollar in recent weeks because they made

3. to raise borrowing rates and investors’ speculation that another increase might be on the way helped to bolster the dollar in recent weeks by making

4. to raise borrowing rates, along with investors’ speculation that another increase might be on the way, helped bolster the dollar in recent weeks because it made

5. to raise borrowing rates and investors’ speculation of possibly another increase on the way helped bolster the dollar in recent weeks because they made

答案是C。我的问题是，help to do可以吗？