B.
Target	Strain code	Efficiency	R²	Slope
XF	CFBP 7970	101.4%	0.978	−3.289
XFF	CFBP 7970	101.1%	0.997	−3.297
XFM	CFBP 8416	100.4%	0.995	−3.311
XFMO	CFBP 8084	100.0%	0.996	−3.299
XFP	CFBP 8402	112.6%	0.995	−3.052
XFFSL	CFBP 7970	95.5%	0.996	−3.434
XFFSL	CFBP 8084	102.0%	0.957	−3.274