Question on I-134

[t_shivam]

How do i answer the following question on i-134,

2. That I am years of age and have resided in the United States since (date) --------------


given the following situation:

1. I was in US on a B1 visa in March 2000 for three months.
2. I was in US on L1 in April 2001 for four months
3. I was in US on L1 in August 2002 for three months
4. In in US on H1 since March 2004.

Should i enter March 2000 or April 2001 or March 2004

[immihelp]

March 2004