Which of these sentences from the paragraph best supports the paragraph's central idea that "before the symptoms of als began causing problems for gehrig, he was one of the greatest baseball players in history."
a. sixty years after he retired, fans made him the leading vote-getter for the major league baseball all-century team.
b. the streak was cut short by gehrig's retirement due to als.
c. known as the "the iron horse" because of his durability, gehrig played in 2,130 straight games without an absence.
d. the streak of 2,130 consecutive games stood for 56 years until it was broken by cal ripken, jr. in 1995.