A software engineer from London arrived to the US on February $1$st of the current year on a temporary work Visa. He rented an apartment in California while he maintains a home in London for his wife and children. How will you determine what type of tax return he needs to file for the current year if at all he needs to file a US tax return?

All foreign workers are automatically considered non resident aliens for tax purposes

Determined by the location of his job

Determined by his temporary work visa status

Determined by the number of days spent in the US including the past two years