please solve

13.Archaeologist's plan to examine a sample of two-meter-square plots near an ancient Greek city for artifacts visible in the ground. They randomly choose three plots from each of the following areas; floodplain, coast. foothills, and high hills. What kind of sample is this? AJA simple random sample BJA stratified random sample CJA voluntary response sample DJA convenience sample Which histogram represents the data with the largest standard deviation? Note that each histogram is on the same scale. Figure A Figure B Figure C Figure D CA. The histogram for figure A B. The histogram for figure B C. The histogram for figure C D. The histogram for figure D