(d) We need a verb in the past participle form to fit in the passive voice construction ARE + VERB. The sentence talks about how individuals and organisations are trained to reduce tension and focus on building an agreement. CONDITIONED, TRAINED and ACCUSTOMED (in the habit of) will fit here. Thus, (d) is the right answer. A is incorrect as CONDITIONING is a verb in the continuous form. D is incorrect as TRAIN is a verb in the base form. E is incorrect as CUSTOM is a noun.
16, 15, 24, -1, 48, ?
140, 146, 158, 176, ?, 230
15.975 ×27.825 + (76.01)² + 12.98×18.426 = ?+ (79.09)²
216, 81, 297, 378, ?, 1035, 1728
45, 59, 31, ?, 17, 87
18 29 16 31 ? 33
32, 64, 144, ?, 990, 2970
16, 9, ?, 114.25, 750.625, 6396.3125
14 6 4 4 ? 48
...58 69 56 ? 54 73
...