Which of the following are true about sequential searching a linear file? Select all that apply. There will be a deduction for incorrect selections.

		a) Move to the Front is considered better than Transposition because it responds more quickly to changes in retrieval patterns.
		b) The efficiency of a sequential search can be improved by placing the records with the highest probability of retrieval at the beginning of the file.
		c) For Transposition and Move-To-The-Front, if you do not know anything about the usage patterns of newly inserted items, then the best place to insert is at the beginning of the list or file.
		d) Sequential search can only be done on sorted data so you can stop even if the search target is not present.