Use the following information. Revenue for the current period $=$ R$980$ million $-($previous period was R$780$ million$).$

Operating cost for the current period $=$ R$23000$ million $($previous period was R$55$ million$).$

Calculate the growth rate for revenue and for operating cost respectively:

$($a$)$ Revenue $-25,64\%($decline$)$; Operating cost $58,18\%($growth or increase$)$

$($b$)$ Revenue $25,64\%($growth or increase$)$; Operating cost $-58,18\%($decline$)$

$($c$)$ Revenue $20,41\%$ growth or increase$)$; Operating cost $-139,13($decline$)$

$($d$)$ Revenue $-20,41\%($decline$)$; Operating cost $139,13\%($growth or increase$)$

Select one:

a$.$

Revenue $25,64\%($growth or increase$)$; Operating cost $-58,18\%($decline$)$

b$.$

Revenue $-20,41\%($decline$)$; Operating cost $139,13\%($growth or increase$)$

c$.$

Revenue $-25,64\%($decline$)$; Operating cost $58,18\%($growth or increase$)$

d$.$

Revenue $20,41\%$ growth or increase$)$; Operating cost $-139,13($decline$)$