What is the meaning of the idiom underlined in the
excerpt?
read the excerpt from "daughter of invention".
"maybe not. maybe, just maybe there's something they've
missed that's important. with patience and calm, even a
burro can climb a palm." this last was one of her many
dominican sayings she had imported into her scrambled
english
anything can be accomplished.
anyone can make money.
a little encouragement goes a long way.
every story needs to have a point.

Anything can be accomplished.

Explanation:

This idiom means that anything is possible. The means for it to be possible, according to 'her' was patience. A burro is a donkey, so the idea of a donkey in a palm tree is ridiculous.

Nonetheless, the image of a donkey climbing a palm tree with only willpower and patience definitely makes the point that where there is a will there is a way. This would be the equivalent saying in English and has exactly the same meaning.

c. barbarians with unexpected intelligence  

depends on your school

when i was in high school i took ap biology my senior year and it was the hardest one for me because my teacher finished the material within the first month of school and then went on to doing advanced college level it was horrible. but at a nearby school ap biology was one of the easier aps. also, it depends on what you are interested i like math a lot so ap calculus was easier for me than most but i hate history so ap us government was harder for me than most.