There are two types of variables, those qualitative that refer to names, order, or binaries, for example, ye or no, white, blue and yellow, etc. Meanwhile those quantitative can be discrete or continuous this includes quantities, like 5.5, 5.6, or 1, 2, and 3. so if the frog has 4cm long we are in the presence of quantitative data, and the correct answer is option A.