单项选择题
Which of the underline expressions is the hedging of the following sentences.
For example, it may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.
A． For example, it may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.
B． For example, it may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.
C． For example, it may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.
D． For example, it may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.
