Write the next sentence in the following story.

How to choose an email service
If you need lots of space and simplicity, gmail is the one for you.
Gmail continually gives you more space. It is currently offering 15 gigabytes of space.

Choices:
[a]. While gmail is an extremely simple email program, it has a large number of features and 30 different languages, but if you just want to receive and send emails, you can just ignore these options. Another great thing about gmail is that you have no banner ads.;
[b]. If your one-click browser is of no use, you may not have enough space to run emails. Both java and internet explorer may provide strong interface with emails.;
[c]. You can only have one browser at a time when you need it. Yahoo is a good example of a good one.;
[d]. Email normally offers 121 gigabytes of space, but different gmail providers have different pricing terms. If you need a sizable majority of your space, sign up for outlook at a large start-up cost.;. The answer should be
[a].