Which best describes the style of this essay?

in middle school all students had to take home-ec, whether we wanted to or not. we thought it was a waste of time, as the oven was so old everything you baked got burnt. the sewing machine kept breaking on us, and our teacher used to forget our names and her lesson plans constantly. she’d walk around calling bernie berbett and jamie jeanette. it didn’t matter how often we corrected her; the next class, she’d do it again. the worst was last year when a group of seventh graders nearly set fire to the school because their oatmeal cookies caught fire in that old, rickety oven!

a) colloquial
b) formal
c) informal
d) all of the above

in other words

to put it differently

for one thing

as an illustration

in this case

for this reason

to put it another way

that is to say

with attention to

by all means

important to realize

another key point

first thing to remember

most compelling evidence

must be remembered

point often overlooked

to point out

on the positive side

on the negative side

with this in mind

notably

including

like

to be sure

namely

chiefly

truly

indeed

certainly

surely

markedly

such as

especially

explicitly

specifically

expressly

surprisingly

frequently

significantly

particularly

in fact

in general

in particular

in detail

for example

for instance

to demonstrate

to emphasize

to repeat

to clarify

to explain

to enumerate