Write the next sentence in the following story.

How to transfer files between ftp and google drive using backup box
Use a tool called backup box, which is a website built entirely to help people transfer files between different services.
Quickly create an account by entering your preferred email and password.
You will immediately be asked to connect a service, select ftp and enter in your server credentials.

Choices: (a). Your website will automatically be downloaded to your windows computer. You'll also be prompted to enter your ftp address, so follow the instructions. (b). Print the backup box to your email address. You will then be prompted to print it to your google drive address. (c). Once the software is finished making the process easier you can manually copy the file. Drag the file into the backup box. (d). Browse to the folder that you wish to transfer. Authorize your google drive account by clicking the other " click to connect " button, choose a friendly name, and then click " authorize this connector.. The answer should be
(d).