 
<translate> Na farko, muna bukatar mu ƙayyade farashin da lamba a kowane daga cikin biyu zabi. Za mu fara da yin 50 / 25 = 2 lambobin sadarwa ga kowane dala da aka kashe akan zaɓi A. Na gaba, mun ƙayyade farashin kowace lamba na madadin zaɓi. Muna yin wannan ta hanyar yin 99 / 33 = 3 lambobin sadarwa ga kowane dala da aka kashe akan zaɓi B. Tunda 3> 2, Adrian ya sayi zaɓi B. Saboda haka amsar ita ce 3. Amsar ita ce 3. <eng> First, we need to determine the price per contact in each of the two choices. We begin by performing 50 / 25 = 2 contacts per every dollar spent on choice A. Next, we determine the price per contact of the alternate choice. We do this by performing 99 / 33 = 3 contacts for every dollar spent on choice B. Since 3>2, Adrian purchases choice B. The answer is therefore 3. So the answer is 3. 