Put the following in chronological order: Syntactic bootstrapping, word burst, Understanding Grice's maxims, Acquisition of past tense morphology?
1) Syntactic bootstrapping, word burst, Understanding Grice's maxims, Acquisition of past tense morphology
2) Word burst, Syntactic bootstrapping, Understanding Grice's maxims, Acquisition of past tense morphology
3) Understanding Grice's maxims, Syntactic bootstrapping, word burst, Acquisition of past tense morphology
4) Acquisition of past tense morphology, Understanding Grice's maxims, Syntactic bootstrapping, word burst