C” has remained the same for over fifty years

Pushpalal (Mid-Hill) Highway (H18) (Nepali: पुष्पलाल (मध्य-पहाडी) लोकमार्ग (रा.१८)) is an ongoing road project in Nepal, which is thought to be 1,776 kilometres (1,104 mi) long. After completion, it will be the longest national highway of Nepal. Nepal has three geographical regions from east to west, plain land or Terai in south, higher mountains or Himalayas in north and hills in middle region. The highway runs through the mid-hills region only. It starts from easternmost hill at Chiyabhanjyang of Panchthar District (Province No. 1) and ends at westernmost hill at Jhulaghat of Baitadi District in far west (Sudurpashchim Pradesh)
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
The correct answer <em>"c. social identification with a group can increase ingroup favoritism."</em>.
In the Jigsaw classroom work, Aronson demonstrated that when a group formed of students from different backgrounds is created and each member shares a specific role, there is a reduction in prejudice and stereotyping. Additionally, subjects tended to improve their relationships within-groups and out-groups.
The cave experiment, two groups of individuals from a similar social background were formed and put into a competition between each other. After the tasks they were assigned, there was a clear increase in prejudice and in-group favoritism from members of both groups.
Both experiments had a different focus on the same issue, which was that social affinity increases behaviors of prejudice and stereotypes in regards to other groups.
D) Rifting adds new rock to a continent and cause the continent to become wider.
Hope that helped, Good luck! (: