Which of the following shows the correct sequence of events? (1point)
a. chargaff's base ratio analysis-> miescher; s isolation of dna -> franklin's x-ray diffraction studies
(b) griffith's transformation experiment -> chargaff's base ratio analysis -> watson and crick's model of dna
(c) franklin's x-ray diffraction studies -> hershey-chase experiment-> avery's transformation experiment
(d) miescher's isolation of dna -> franklin's x-ray diffraction studies -> griffith's transformation experiment