Read this excerpt from the secondary source "abraham lincoln's boyhood home at knob creek."
likewise, he never forgot the time he fell in the swollen knob creek while playing on a foot log near his home. had it not been for austin gollaher, a friend and school mate, abraham would probably have drowned. austin, with a keen sense of pioneer knowledge, grabbed a long tree limb from the bank and held it out like a strong arm to the struggling lincoln. abraham spoke of the incident after he became president.
based on this passage, lincoln
a. achieved his presidency without from others.
b. stopped thinking about his childhood later in life.
c. was reluctant to accept or acknowledge as a child
d. showed gratitude towards those who him.

D. showed gratitude towards those who helped him.

Explanation:

The excerpt talks about an event in which Abraham Lincoln got help from somebody else when he was in danger. The recognition of the person that helped him once a long time ago, and the memory of the kind actions of his friend, too much time later, when Abraham was serving as a President, are clear signs that Lincoln was humble and capable of showing gratitude for those who helped him.

b. they require a huge investment of time, dedication ,training, and patience almost from the day they are born.

explanation:

the sentence gives a clear evidence of how carefully the sar dogs are selected and also specify from what time this exercise begins."almost from the day they are are born." this sentence shows as that this exercise begins early.

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