Top-down integration testing has as it's major advantage(s) that
a) low level modules never need testing
b) major decision points are tested early
c) no drivers need to be written
d) no stubs need to be written
e) both b and c

browsing like internet search? don't look at anything stupid. or set up restrictions on ur device's search engine. and if something suspicious comes up don't be dumb and click on it. i hope that's what ur question meant.

the answer is b. executive summary. a management summary, or executive summary, is a short article or section of a document, produced for business purposes, that condenses a longer report or proposal or a group of related reports in such a way that readers can rapidly become familiar with a large body of material without having to read it all.