To answer this question, we need to understand the meanings of the given options:
Option A) Good Morning - This option is incorrect because "Good Morning" is a greeting used to say hello or to wish someone a good morning, but it does not express "welcome".
Option B) Welcome - This option is correct because "Welcome" is a greeting used to express a warm reception or to invite someone in.
Option C) You are welcome - This option is incorrect because "You are welcome" is a response to someone saying thank you, not a greeting or welcoming phrase.
Option D) Thank you - This option is incorrect because "Thank you" is a phrase used to express gratitude, not a greeting or welcoming phrase.
The correct answer is Option B) Welcome. This option is correct because it is a common way to greet or receive someone.