Steve is creating a document with proper nouns, which Word continues to identify as being misspelled. Which of these steps should he do in this situation?

Skip the Spell Checker.
Right-click the noun and choose Ignore All.
Right-click and Add to dictionary.
B and C are correct.

Css3 is the latest evolution of the cascading style sheets language and aims at extending css2.1. it brings a lot of new features and additions, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.credits to medium for making this answer credits to google for copying this answercredits to me for putting this answer on your question

Answer eccentric gear and pin;

There is a paper clip on the bottom left side below the question box 

The steeply sloping region of a continental margin where the sea floor descends at a rate of greater than 1 ft for every 40 feet is called. continental slope.