Answer: Option E
Step-by-step explanation: In simple words, sales promotion refers to the process under which an organisation tries to persuade customer to buy its product by using several marketing and advertising strategies.
Direct marketing refers to the process in which a company performs its marketing strategy without the help of any middleman.
Therefore, we can conclude that option E is correct as the company is sending an email direct from its office so it is direct marketing and the objective of mail is to promote sales which depicts sales promotion.