Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to interview a source via email [title] Send your source a letter of introduction and explanation about the purpose of your interview. [step] Include your contact information, which publication or company you're working with, deadline information and anything else that the source should know before agreeing to the interview. It's helpful to include an estimate of the amount of time your source will spend answering your questions.

Ending1: [title] Find out if your source is an earlier person. [step] Before approaching your source, go online and search for his or her credentials as indicated in the above section. Ending2: [title] Come up with a preliminary pitch for your topic. [step] Your pitch should only include facts and details you believe will support your point, but leave room for responses. Ending3: This is especially important if the source may have time to prepare a few more questions. [title] Decide whether you want to interview personally or in person. Ending4: Set a timeline for your source to answer and request confirmation. [title] Reduce the number of questions from what you would normally ask during an in-person interview.

Answer format: ending1/ending2/ending3/ending4