What best practice should you follow when sending attachments with business emails?
A. Send attachments in a separate email.
B. Inform the recipient about the attachment.
C.
Send attachments through IM rather than email.
D.
Send attachments individually to multiple recipients.
E.
Combine large attachments together in one email.

B.  Inform the recipient about the attachment.

Explanation:

Email is generally the easiest and fastest way to communicate with people,  business partners, investors, customers, etc. When writing a business or an official email, you are expected to mention in the body that, you have attached a file and this can be done, for example, by saying, "please find attached documents relating to last week's sales". So, what you do is refer to the attachment to let the recipient know, there is a file attached.  Most often than none, people are not aware of any attached file to an email because it was omitted in the main body of the email.  

the sentence that contains a restrictive clause is a.they decided to meet where the band was performing

explanation:

a restrictive clause is also known as an essential clause

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