Roygbiv is an a. acronymic sentence c. flashcard b. acronymic abbreviation d. none of these

b. Acronymic abbreviation.

Explanation:

Acronym is the use of the first letter of each word while an abbreviation is the shortened form of a given words in a  sentence.

Considering the given acronym ROYGBIV, they stand for a specific name of colors that make up the colors of the rainbow.

R-Red

O-Orange

Y-Yellow

G-Green

B-Blue

I- Indigo

V-Violet

The whole acronym also stands for an abbreviated word. Thus, the correct answer for the given option is acronymic abbreviation.

postive, comparative, superlative - good, better, best

recall how we defined nouns as words capable of having plurals and possessive endings. adjectives (and their first cousin, the adverb) also have a feature that distinguishes them. they come in three states. first, the raw adjective—in its positive state—merely describes the noun modified; it doesn’t care about how this particular person or thing stacks up against other members of the same noun class

c -invasion by the moroccans.