23. Which of the following is closest in meaning to “Guam’s spider population may once have been unremarkable” in Paragraph Four? (A) There may have been few spiders on Guam before. (B) The spider’s webs on Guam were not remarkably beautiful before. (C) The number of spiders used to be smaller than the population of Guam. (D) There may have been more spiders on Guam than on the nearby islands.