Could use help with the first or second one please! P

The blank is type of decision-maker who over analyzes information

You wanted to look up information about alzheimer's, but you were unsure if it was spelled "alsheimer's" or "alzheimer's." which advanced search strategy would be useful? a) a boolean search b) using a wild card in your search c) trying different search engines d) doing a search for "alsheimer's not alzheimer's" asap. ill give brainlist.

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