Which statement correctly interprets limit of startfraction 28 x minus 10 x squared over 4 x squared minus 1 endfraction as x approaches plus-or-minus infinity?
a) The function f(x) = ²⁸x - ¹⁰x² / (4x² - 1) has a vertical asymptote at x = 7.
b) The function f(x) = ²⁸x - ¹⁰x² / (4x² - 1) has a vertical asymptote at x = -^{5/2}.
c) The function f(x) = ²⁸x - ¹⁰x² / (4x² - 1) has a horizontal asymptote at y = 7.
d) The function f(x) = ²⁸x - ¹⁰x² / (4x² - 1) has a horizontal asymptote at y = -^{5/2}.