Final answer:
The effect of obtaining a Tier 1 Twinshot Heart as of the 12/8/21 and 1/5/22 updates is: Your team counts as having 1 additional Twinshot. Grants a Kog'Maw (A).
Step-by-step explanation:
Twinshot Heart at Tier 1 maintains its primary effect, providing an extra Twinshot and initially granting a Kog'Maw to the team. However, the updates on 12/8/21 and 1/5/22 modified this, adding Graves as an additional champion. So, while the fundamental effect remained unchanged, the item now offers both Kog'Maw and Graves when acquired at Tier 1.
This alteration expanded the options available to players, enhancing team composition possibilities by introducing Graves alongside Kog'Maw. Therefore, the Twinshot Heart's basic benefit of supplying an extra Twinshot persisted, with the later updates enhancing its value by diversifying the champions it grants.
Correct answer: A) Your team counts as having 1 additional Twinshot and grants a Kog'Maw.