I think the answer is A. hope this helps
Answer
B. Spell checker
Explanation
Spell checker is a program designed to identify misspelled words and notify the writer about the mistake. The programs can further auto correct the word or allow the writer to choose from various corrections of the word. In Microsoft, a red underline appears on the misspelled word to display the error.
Blocking, covering, obscuring, hiding, concealing, veiling, shrouding, darkening, extinguishing, shading, dimming, declining, diminution, extinction, penumbra
Make sure it is outdoors, roof mounted, or in the attic.
Most roof antennas will give you radio reception similar to a car radio, or often better.
Try repurposing a TV antenna you already have; use an FM splitter to use it on your radio. ...
Consider an omnidirectional radio antenna.