Select the correct statements among the following: A. Slow neutrons can cause fission in \( \frac{235}{92}U \) more effectively than fast neutrons. B. \( \alpha \)-rays are Helium nuclei. C. \( \beta \)-rays are fast moving electrons or positrons. D. \( \gamma \)-rays are electromagnetic radiations with wavelengths larger than X-rays. Choose the answer from the options given below: