The religion of early Vedic Aryans was primarily the worship of nature and Yajnas.

The early Vedic Aryans worshipped various natural elements and forces such as the sun, the wind, the fire, the rain, the sky, the earth, etc. They believed that these natural elements were divine and worshipped them through rituals and sacrifices called Yajnas. The Yajnas were performed by the priests or the Brahmans and were believed to bring the worshippers closer to the gods and to ensure their blessings.

The concept of Bhakti (devotion) was not prominent in the early Vedic religion, although it later evolved in the later Vedic period and the post-Vedic period.

Therefore, option (c) "worship of nature and Yajnas" is the correct answer.