Which word is an interjection?

ouch! that thorn on the rosebush scratched my finger and my wrist.

a.
on

b.
ouch

c.
and

d.
that

In 1896, a 308-page edition of  the american wheelmanearned the distinction of being "the largest magazine ever issued from a printing press,” according to the advertising journal  printers’ ink. which accurately describes this statement? it is subjective because the information contained in this statement cannot be proven. it is subjective because everyone would agree with the information contained in this statement. it is subjective because the information contained in this statement can not be proven. it is objective because the information contained in this statement can be proven. it is objective because not everyone would agree with the information contained in this statement.

Must read story will give if ! in “perseverance,” which theme is reflected in the lines, “life’s field will yield as we make it / a harvest of thorns or of flowers”? a: life is a field in which flowers and thorns will grow. b: accept what you are given, because you cannot change it. c: your life is the result of the work you put into it. d: working together people achieve their goals in life.

Which is these is not a benefit of parallel structure? a)clarity b)classification c)emphasis d)balance