A new polymer has been synthesized with the structure - (CH2-CHR)n- where R contains the groups of -C(=O), and -C6H5. The group attraction constants G [(cal cm3)1/2 mol-11 are for -CH2- is 133, and for -C=O it is 275, and for -CH-it is 28, and for -C6Hs it is 735. Using the equation for solubility parameters of polymers o[(cal cm)1/2] =DEG/M where M is the molecular weight 132, d is the density of 1.2 determine which of the following solvents will most likely dissolve the polymer? (Choose from the following four possibilities)