Which is the tense of the underlined verb?

we have been thinking of putting up another fence.

a.
past progressive

b.
present perfect progressive

c.
present progressive

d.
past perfect progressive

20 pts + brainliest for a answer the structure of a written work—the way a work is built using sentences, paragraphs, chapters, or sections­—can an author develop and communicate ideas to the reader. how does the structure of paragraph 1 develop the ideas in roosevelt's first inaugural address? select each correct answer. by beginning with concrete examples and moving on to abstract ideas, the author readers understand the major points. by beginning the paragraph with references to himself and the audience, the author makes his ideas more approachable. by moving swiftly from topic to topic, the author emphasizes the importance of the nation's problems. by summing up the points that he will raise, the author creates a preview of the later paragraphs in the speech. by mixing shorter sentences among the long sentences, the author makes his ideas flow more smoothly and understandably.