In some cases like the word vice, the negative connotation stems from a direct definition of the word(vice means wicked, but another definition is 'a substitute for' so 'vice president'). In other cases, word may be used in a culture to identify a group or individual that is portrayed negatively, thus modifying the inherent definition of the word to better portray how society thinks of the word.
The answer to one is violin viola cello and bass.
Frederick Douglass and Harriet Beecher Stowe mainly wrote about slavery.
It is a method of using ingredients to create some thing for eg. food recipe
to be precise : a set of instructions for preparing a particular dish, including a list of the ingredients required.
The answer is both a and c.