Question

read the post from the blog geekgirl loves gadgets.
which best describes the purpose of this blog post?
guys, you know me. you know that there isnt a device
that i can resist. new technology! yippee! bring it on. but
when i heard that they are soon going to bring cell - phone
service to the subway tunnels i gasped. (okay, maybe it
wasnt a gasp, but it sure was a sigh) are you really
going to unleash at least twenty - five cell - phone calls in a
crowded train at rush hour? why cant people just make
their calls on the subway platform before they get on the
train? this is one case where we can ask, just
because we can do it, does it really need to be done?
○ to instruct
○ to entertain
○ to persuade
○ to advertise

Explanation:

The blog post uses a light - hearted and somewhat humorous tone (e.g., "Yippee! Bring it on" followed by a negative reaction to subway cell - phone service). It doesn't give instructions (no "how - to" content), isn't trying to sell something (so not advertising), and there's no strong argument to convince (no persuasive language like "you should..."). It's more about sharing a personal reaction in an engaging way.

Answer:

to entertain