1. A and B. The TelephonyManager can provide Call State and Network Type information.

2. False. There is no built-in MIME support. Instead, this hour demonstrates how to add external libraries that have MIME support.

3. False. Lengthy operations, such as networking operations, should never be performed on the UI thread to keep the handset as responsive as possible.

4. A and D. An AsyncTask is really a helper class that simplifies the use of a Thread. Both classes can be used. The other two are not SDK provided classes, if they exist at all.

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