ANSWERS :
167:C; 168:C; 169:B; 170:A; 171:D; 172:D; 173:D; 174:B; 175:B; 176:A; 177:D; 178:C; 179:D; 180:B; 181:D; 182:C; 183:D; 184:B; 185:D; 186:D; 187:A; 188:B; 189:C; 190:C; 191:B; 192:B; 193:C; 194:D; 195:A; 196:B; 197:B;
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