What is a question to ask yourself if you are trying to decide if something is
an opinion?
a. is this just what this person thinks?
b. can i agree or disagree with this?
c. could anyone think differently about this?
d. all of the above

D. All of the above.

Explanation:

An opinion is something someone thinks, and is something that cannot be proven. You can disagree or agree with someone's opinion.

For example, the statement " Autumn is the best season" is an opinion. You may disagree and think that "Spring is the best season" not Autumn. Your mom may disagree with both of us, saying that "winter is the best season". None of these statements about the best season can be proven, and anyone can disagree with them. Therefore, it's an opinion.

postards have pictures on them, these pictures are things that may never be seen again. the pictures are a part of our history that shows things. because of this many collectors would pay a lot of money for them.

i read on google they "offer a glimpse into the past"

hope this : )

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."