Which source is not a valid data source for a mail merge? database outlook contacts excel worksheet pdf document

Iam a bacterium. i cause stomach cramps and diarrhea. i am caused by eating rotten foodssuch as chicken, fish, or eggs. sometimes turtles carry my bacteria. what am i?

The first time a user launches the powerpoint program, which view is shown allowing the user to access recent presentations or create new presentations based on templates?

Which of the following "invisible" marks represents an inserted tab?