OG详解-OG10 文法 Q4

Choice D is the best answer. The convention being tested is the use of verbs to express tense. In this choice, the present tense verb “is,” used in conjunction with the word “today,” correctly indicates that Paik is currently considered the first video artist. 
Choice A is incorrect because the future tense verb “will be” doesn’t indicate that Paik is currently considered the first video artist. Choice B is incorrect because the past perfect tense verb “had been” doesn’t indicate that Paik is currently considered the first video artist. Choice C is incorrect because the past tense verb “was” doesn’t indicate that Paik is currently considered the first video artist.