Please can someone help with this question thanks so much

Let 8(a) be the number of households that own a highefciency washing machine, where t is the number of years since 1990. In 2010, the number of households using a highefciency washer was increasing at an increasing rate. Choose the best expression to match this statement. 0 Sign) of [1 and S\"(20} c D. 0 Sign) ';> o and S\"(2IJ) = o. O 3"(20) > 0 and 3"(20) o. O 3120} 2 n and 3"(20) > o