Which of the following statements are true regarding a tocotransducer and a spiral electrode used in fetal monitoring?
A. They can measure the intensity of uterine contractions (UCs).
B. They are used to determine fetal lactate levels.
C. Tocotransducer reports the duration and frequency of UCs.
D. Spiral electrode can monitor fetal heart rate accelerations.
E. Both systems are used for the assessment of uterine activity.