In which sentence is the underlined word an indefinite article?

a.
our mail carrier left one package.

b.
the sky is clear today.

c.
i found a bag of marbles

(these are the one that are underlined)
(a is one)

(b is the)

(c is a)

Read the passage. (1) since prehistoric times, milk has been a vital source of nutrition for human beings. (2) some doctors and nutritionists believe that consuming milk can be detrimental to our health. (3) milk is one of the most nutrient-dense beverages we can consume and it should be an essential part of a healthy diet. (4) drinking just one 8-ounce glass of milk per day puts you well on your way to meeting recommended daily intakes for important nutrients. which transition would be best to use at the beginning of sentence 2? finally additionally however specifically

This excerpt is from “the poet” by alfred, lord tennyson. the poem describes a poet's consciousness and perception. which three lines suggest the richness of a poet's thoughts? thus truth was multiplied on truth, [the world like one great garden show'd,] and thro' the wreaths of floating dark upcurl'd, rare sunrise flow'd. [and freedom rear'd in that august sunrise] her beautiful bold brow, when rites and forms before his burning eyes melted like snow. [there was no blood upon her maiden robes] sunn'd by those orient skies; but round about the circles of the globes of her keen eyes and in her raiment's hem was traced in flame wisdom, a name to shake [all evil dreams of power--a sacred name.] and when she spake, [her words did gather thunder as they ran,] and as the lightning to the thunder which follows it, riving the spirit of man, making earth wonder, so was their meaning to her words. no sword of wrath her right arm whirl'd, [ but one poor poet's scroll, and with 'his' word] she shook the world.

Why do you think benjamin franklin used the pseudonym mrs. silenced dogood?