Poll is closed! We pulled through with the correct answer over all!
Correct answer: "you're very lucky, you wretched girl!"
This expression is rather scathing, but based on context/delivery, the scorn can be read as joking.
死 sǐ = dead; damn/wretched; rigid (stubborn)
丫头 yā tou = [dialect] girl
命 mìng = life; fate (fortune, luck)
真好 zhēn hǎo = very good
Because 死丫头 can mean both "wretched girl" and "stubborn girl" (it's sort of like "you little bitch", basically), the key to choosing the correct answer, and choosing being option 3 and option 4, is the use of 命. In this case, 命真好 means "you're very lucky" because although 命 does have the meaning "life", too, it more so refers to the state of being alive/the life you possess.
There are three words in Chinese which mean "life"; 命,人生 rén shēng, and 生活 shēng huó. 人生 refers to life as in the entire span of one's life (a lifetime). 生活 refers to life as in livelihood (activities and lifestyle).
Therefore, "life" in the context of “Your life is very good" would not use 命, it would use 生活. That is why 你命真好 means "you're lucky", and more to the point, why the answer is not option 4.
The answer is not option 1 because that is a literal character for character machine level translation.
It is not option 2 because I made that up to fool people who only recognise a few individual characters. I will admit, I am surprised this one came in as the runner-up, but it was a trick smart-sounding type answer.
The lack of the characters 你 (you) and 女 (girl) in the 死丫头命真好 may have also made this sentence tricky for beginner language learners to read. Remember: including the subject of a sentence in Chinese is optional and done more to create emphasis, especially in informal dialogue.