While reviewing a web site that seems to have lots of great information about the topic you are researching, you decide to check on the author of the site. you verify that the author is well-known and considered an expert on this topic. what characteristic of an effective web site does this show?
reputable source
relevant
verified
unbiased

i think the answer is a or d

there is no universally accepted definition of art. although commonly used to describe something of beauty, or a skill which produces an aesthetic result, there is no clear line in principle between (say) a unique piece of handmade sculpture, and a mass-produced but visually attractive item. we might say that art requires thought - some kind of creative impulse - but this raises more questions: for example, how much thought is required? if someone flings paint at a canvas, hoping by this action to create a work of art, does the result automatically constitute art?